koehler



C. J. KOEHLER.

ELECTRIC STERILIZER.

' APPLICATION FILED APR-.H. 1919.

' Patented Sept 2,1919.

2 SHEETSSHEET1 CHARLES J/fOEHLf/R Inventor 9% (/L/ at.

Attorney Witness:

C. J. KOEHLER.

' ELECTRIC STEHILIZER.

' APPLICATION FILED APR. 11. I919.

1 ,3 14,671 Patented Sept. 2,1919.

2 SHEETS- SHEET 2- CHARLES J A EHLER Witness: Inventor- 9 (MAME/5 W Saa Attorney UNITED STATES PATENT OFFICE.

cHe EsJ, KqE nEp, OEHAMIALTON, oHIo, ASSIGNOR T AUTOMATIC ELECTRIC STERLLIZEB OM ANY, 0F HAMILTON, OHIO.

S pecifi e at ion of Letters Intent.

ELECTBJC smnnln znn,

Ra tented Sept. 2,1919.

To all whom item/ 1y congem;

Be it known that I, 'C ninnns J. KO HLEB,

a citizen of the United States, residing e Hamilton, Bdtler oo l inty, Qhio, he ve" n} ments in Electri e 'Steiiliielfs, of wh ch the, following a spec'ifiostion. v This invention, ei taining to elegtl flg ste r e i to i deQ fiQe emf 1% and will be. reedily nndegsto od from" the following rie e ek s eeeeet n w th e e e epen s ewin e 9e et 9i sceles in'whiehz I Fighre 1 is a front leyetion t gt steel; lizer enib odyingim'y invention: F 2 e 'p l he bw et s r. efieqting the oontfol of the eleetriq ot 'rent;

F 3 Y rt e lone t idine seetwn of, a portion of this z ppei z tus in the plane 9i? line it of Fig. 2: I

4 a vert w t enw rse seet en a part of this co t ol-ling eppeltetns in the plane of; line b of Fig. 3:en d

jig. 5 1 diagram ilhlstra ting the eleet jc In the dmwingsz 1, sterilizing eabinet:

2: Sign t rwm '3, electric lzymps on the geloinet;

e ee n w the a net nd containing mechanism fo the eont 'ol of'the cixduits: i

5 e h d e fe t enet ne th Switch-ted ofthehoxL (M be; u de t i e f r the switch: i l f" a sula g b se di msed i th bo 5. d 8, two peii's of terminals zittziched' to the base 7 and forming pirts of knifeswitohesi 9, a bar of insulating metenial to slide on the base w l v 1 0, knife-edgedgross-bets attached to slidme he an a p d t m ple e e; l e pe tiVeIy, with the pairs of tern inaIs'S i 1 1 191113 m in Q m c ed t a pa t'q h te m na s 8: i

12, a 130d disposed in line with be? and edipted to slide in the end walls of box 4', this red hay' outer end e le n 1 3", zi conpling connecting the'be f with the lost motion 5 d o h I couplin he ie- Seme deg e ff Ins h M 41??? i e 5 Q i this, spring serv g 110 cushicm 7 99 e ing movement of the "rod:

nd serv ng b, t od m iement' Of the gli K; cell r 'fst' n h od. 911 e d of epr'i i l a ing ageiesi th s @Ql 17, Spring (klbtl li ll lgj ifelilgllii; kgqwn ehe ee e j 'fi i' h s'e ii x nbx 4 71$; el e retested th 5 mo men new-g i l'em it'be ilfis n r a y e'gei ist th lili ce f l1if 6= a bell ce j d th 1 meveme m O, semi: P sed W ese -fil biY fi l of box 4:

2 tries-e iaied t e ie ere er and ed ipfileel t en age 5-. nldt r d and: eld 'ro i i s fi ti e besit on =7 21, e. shimmer 6f he. ed; be h a hY' hHtii-sr whe her l i in e' PQsiti R i Q Ye R IiI g u g ng the r er t s t n o fe igqe i fl it 3; x'ndlecqnne ted w h t g ieYe 'ior e eii' ihsit y he l 2 t, ss sses 24, the loosely sliding core of this solenszid, e same ein" dapted to, lig ig the these! leis e i st' 29 n .2, eremevibl ii niieyconn ng d- 30H" 3 a w n meeting bind moste 31 vyith'one of the terininals 8: and

4 leme 9 W t w th de ml ser li preset 'epp et h s be n esi prim r y fer the St liZa-t bn o lesi ei en h e 's u ed Q Ii Q iQI with d eeh The, i is soils 2 an the 1 'er 27 are inlo$d W h n th l is; h n p ep rl su p with 611mm, to faise the temperatnlie in the sterilizing chamber, and it being'tl e dnty' o the h rm static circuit cl ser'tQ bp t it b j e' t du y 6f the eircflit when the 'desitedsterili zjing teniperqpushed in, the result being the closure of the circuit from the supply mains, the wind-v sterilizing chamber shall have reached atemperature of three hundred degrees. The clock movement may be of that known character in which the bell begins to ring ten seconds before the clock stops. The regimen of the apparatus will be as follows :v

The knob is pushed in; the rod latches to active position; the clockwork has been wound; the lamps 8 glow; the coils begin to heat up; the temperature in the sterilizing chamber begins to rise; the thermostatic circuit closer begins to close; the temperature in the sterilizing-chamber reaches three hundred degrees; the thermostat closes; the lamp 3 L glows; the solenoid energizes and unlatches the rod; the rod retracts and, with a slight hammer blow at the coupling, opens the supply circuit; the current through the coils and the lamps ceases; the clockwork starts; at the end of eighty seconds the bell has moved within the range of its hammer; the bell begins to ring; the clockwork stops; the bell ceases ringing; and thesterilizing chamber may now be opened and the contents removed.

The object of the lost motion in the coupling 18 is to cause the retracting switchrod to give a slight hammer blow to the knife switches to facilitate their being-opened. If it be desired to cut oif the supply current at any time, or for any reason, the trigger may be released by means of the handle 23. Lamp 34: glows when the circuit closer closes and should cease to glow almost instantly.

' If it continues to glow it is a sign that the switch-rod has not unlatched by the action of the solenoid, in which case the rod is to be unlatched by manipulating handle 23.

The diagram of Fig. 5 may be takenas illustrating the apparatus designed for the utilization of a supply current at. one hundred and ten bolts. If, current should be applied at two hundred and twenty bolts,

then jumper 32 is to be removed and wire put to binding-post 80-instead of to bind ing-post 31.

I claim 1. An electric sterilizer comprising a sterilizing cabinet, a resistance coil therein, a supply circuit therefor, a kniffa-switchto close said circuit, a switch-rod, a trigger to hold the switch-rod in active position to move said switch to position of closure, a

position, a compression-spring to cushionthe switch-rod when it goes to inactive position, and a lost-motion coupling between the switch-rod and the knife-switch, combined substantially as set forth.

3. An electric sterilizer comprising, a resistance coil, a supply circuit therefor, a switch to close said circuit, a rod to move said switch to position of closure, a spring to move the switch to open position, a trigger to hold the switch to closed position, a solenoid connected with the supply circuit wvhen said switch is closed, a connection between the trigger and the core of the solenoid to release the trigger when the solenoid is energized, and a normally open thermostatic circuit closer disposed in the circuit supplying the solenoid, combined substantially as set forth.

4:. An electric sterilizer comprising, a resistance coil, a supply circuit therefor, a switch to close said circuit, a rod to move said switch to position of closure, a spring to move the switch to open position, a trigger to hold the switch to closed position, a solenoid connected with the supply circuit when said switch is closed, a connection between the trigger and the core of the solenoid to release the trigger when the solenoid is energized, a normally open thermostatic circuit closer disposed in the circuit supplying the solenoid, a clockwork arranged to be wound whenthe switch-rod is pushed to active position and to be started when the trigger releases the switch-rod, and a bell arranged to be rung by the clockwork prior to its stopping, combined substantially as set forth.

5. An electric sterilizer comprising, a re sistance coil, a supply circuit therefor, a switch to close said circuit, a rod to move said switch to position of closure, a spring to move the switch to open position, a trigto hold the switch to closed position, a solenoid connected with the supply circuit when said switch is closed, a connection between the trigger and the core of the solenoid to release the trigger when the solenoid is energized, a handle for releasing the trigger, and a normally open thermostatic circuit closer disposed in the circuit supplying the solenoid, combined substantially as set forth.

6. An electric sterilizer comprising, a resistance coil, a supply circuit therefor, a switch to close said circuit, a rod to move said switch to position of closure, a spring to move the switch to open position, a trigger to hold the switch to closed position, a solenoid connected with the supply circuit when said switch is closed, a connection between the trigger and the core of the solenoid to release the trigger when the 10 solenoid is energized, a handle for releasing the trigger, a normally open thermostatic circuit closerdisposed in the circuit supplyingthe solenoid, and a lamp in'circuit with lithe l.rsl'olenoid, combined substantially as set ort I CHARLES J. KOEHLER.

Witnesses:

M. S. BELDEN, J. PAUL SCUDDER.

Copies of this patent may be obtained for fine cents each, by addressing the Commissioner of Patents,

Washington, D. C. i 

